The marquees went dark at 10:05 p.m. in honor of the 58 victims who were killed during last week’s mass shooting

LAS VEGAS—Digital marquees along the strip went dark for 11 minutes beginning 10:05 p.m. Sunday night, marking exactly one week since a gunman massacred 58 people attending a country music festival here.

More than 50 casinos, hotels and other businesses agreed to turn off marquees and dim other lights in honor of the victims.